Getting "Please match the requested format" with Firefox

[royhills]

I can configure IPv6 using SLAAC, but when I try to use a static address I get the "Please match the requested format" error.  I've seen others report this as a Chrome bug, but I'm using Firefox 49.0.1 on Windows.

pfSense is 2.3.2-RELEASE-p1 (amd64).

See attached screenshot.  I can't see any reason why the IPv6 address is incorrect.  I've allocated similar static addresses to other devices without any issues.

Any ideas?

[jimp]

Use lower case letters, not upper case.

https://tools.ietf.org/html/rfc5952#section-4.3

[royhills]

Thanks.  Using lower case for the alphabetic hex characters in the interface address works.

It's a bit inconsistent though, as the interface allows upper-case characters when adding the IPv6 gateway.